[Influence of traffic restriction on road and construction fugitive dust].
[Influence of traffic restriction on road and construction fugitive dust].
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发表时间：
2009-05
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通讯作者：
Gang Tian;Gang Li;J. Qin;S. Fan;Yu-hu Huang;Lei Nie
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作者：
Gang Tian;Gang Li;J. Qin;S. Fan;Yu-hu Huang;Lei Nie
通过对“好运北京”体育赛事期间道路和建筑降尘量的连续监测，研究交通限制对道路和建筑降尘量的影响。分析了道路和建筑扬尘对北京市大气环境颗粒物的贡献率及其与当地PM10排放总量的比值。结果表明，限行对道路扬尘和施工扬尘的降尘效果显著。限行期间环城道路降尘量均值为0.27 g x (m2 x d)(-1)， 1个月前和7天前分别为0.81和0.59 g x (m2 x d)（-1）。“限行”期间大动脉和小动脉降尘平均值为0.21 g x (m2 x d)(-1)， 1个月前和7天前分别为0.54和0.58 g x (m2 x d)（-1）。与限行前相比，道路排放减少了60%-70%。限行期间民用建筑和公用建筑降尘平均值分别为0.61和1.06 g x (m2 x d)(-1)， 20 d前分别为1.15和1.55 g x (m2 x d)（-1）。施工扬尘较限行前20天减少30% ~ 47%。道路和建筑扬尘排放是北京市大气颗粒物的主要来源，对环境PM10浓度的贡献率为21% ~ 36%。道路和建筑排放的PM10分别占当地总排放量的42%-72%和30%-51%，而当地PM10分别占总排放量的50%和70%。
By monitoring the road and construction dust fall continuously during the "Good Luck Beijing" sport events, the reduction of road and construction dust fall caused by traffic restriction was studied. The contribution rate of road and construction dust to particulate matter of Beijing atmosphere environment, and the emission ratio of it to total local PM10 emission were analyzed. The results show that the traffic restriction reduces road and construction dust fall significantly. The dust fall average value of ring roads was 0.27 g x (m2 x d)(-1) in the "traffic restriction" period, and the values were 0.81 and 0.59 g x (m2 x d)(-1) 1 month and 7 days before. The dust fall average value of major arterial and minor arterial was 0.21 g x (m2 x d)(-1) in the "traffic restriction" period, and the values were 0.54 and 0.58 g x (m2 x d)(-1) 1 month and 7 days before. The roads emission reduced 60%-70% compared with before traffic restriction. The dust fall average values of civil architecture and utility architecture were 0.61 and 1.06 g x (m2 x d)(-1) in the "traffic restriction" period, and the values were 1.15 and 1.55 g x (m2 x d)(-1) 20 days before. The construction dust reduced 30%-47% compared with 20 days before traffic restriction. Road and construction dust emission are the main source of atmosphere particulate matter in Beijing, and its contribution to ambient PM10 concentration is 21%-36%. PM10 emitted from roads and constructions account for 42%-72% and 30%-51% of local emission while the local PM10 account for 50% and 70% of the total emission.